Mercuryless hair-secreting process for felt-making



Patented Mar. 29, 1927.

UNITED STATES PATENT OFFICE.

MERCUBYLESS HAIR-SECRETING PROCESS FOR FELT-MAKIHG.

No Drawing. Application filed February 12, 1926, Serial No. 87, 977, and in France February 28, 1925.

The object of our invention is to provide a process which will do away with mercury in secreting or, as it is sometimes called, carroting According to our invention, secreting or carrot-ing is achieved through the action of urea, compounds thereof or derivatives 7 therefrom.

We have ascertained the properties of said substances through investigations made with the urine of certainfetld or high scent animals such as fox, martin, ape, monkey,

- skunks, minx, wild cat.etc., hair of which will felt without any preparation.

In accordance with .our invention we preferably use nitrate of urea.

We dissolve the latter in any suitable solvent and dilute it with water in variable proportions according to the secretingpower desired to be obtained.

\Ve brush the pelts with this solution by the usual methods and hair off as usual.

We wish it to be clearly understood that our invention covers also treatment by said process as applied to hair already taken off and to pairings.

We claim as our invention:

1. A earroting process, comprising the step of treating hair with a substance containing urea. I

2. A carroting rocess, comprising the step of treating hair with nitrate of urea.

3. A carroting process, comprising the steps of brushing a pelt with a solution containing urea, and then removing the hair from the pelt.

4. A carroting. process, comprising. the

steps of brushing a pelt with a solution of nitrate of urea, and then removing the hair from the pelt.

In testimony whereof we afiix our signatures.

CHARLES PICHARD.

EMILE PICHABD. 

